During April 2025, Mathieu Montin focused on stabilizing the Cardano API within the IntersectMBO/cardano-api repository by addressing a critical integration issue. He exported the fromCtxUTxOTxOut function, which had previously blocked external usage and complicated downstream integrations. By making this function publicly accessible, Mathieu improved the reliability and discoverability of the API for external developers, reducing onboarding friction and support overhead. His work centered on Haskell and API development, emphasizing clear commit-level documentation and enhanced API hygiene. Although the period involved no new features, the targeted bug fix demonstrated depth in understanding integration challenges and maintaining robust public interfaces.